Hyperactivity can be due to sensory issues, specifically a lack of proprioceptive input.
An occupational therapist can help with strategies and activities to address some of this.
Impulsivity is also likely the culprit for some of these behaviors. He isn’t yet able to think about consequences before acting. His brain is just moving too fast.
ADDitude Community Moderator, Parenting ADHD Trainer & Author, Mom to teen w/ ADHD, LDs, and autism